Do you every just lie there and poke your body parts and think "that's going to rot away one day"

That you will be lying there unmoving with no sign that you ever where anything . Had thoughts hopes, dreams and plenty of potential . I must admit the thought of my death offends me simply because I see no point of life if death follows.However this is the way of the universe and i accept it.Im completely fine with death It is what it is .Never really had a problem with it except for confusion over it .
While I am certain it's going to happen one day , a part of my brain I have no control over refuses to believe it. I know it's the same for a lot of people. I wonder why is it because from young ages we are taught to believe we have a part of us that can never die.
No I don't want to hear about how I should live life to the fullest .I know that already I am alive so of course I'll try my best with it. That's not what I'm asking .